package com.zhai.netty.thread.chapter01;

public class ConcurrencyTest {
	
	private static final long count = 1000000000;
	
	public static void main(String[] args) throws InterruptedException {
		concurrency();
		serial();
	}
	
	private static void concurrency() throws InterruptedException{
		long start = System.currentTimeMillis();
		Thread thread = new Thread(new Runnable() {
			
			public void run() {
				int a = 0;
				for(long i = 0;i<count;i++){
					a+=5;
				}
			}
		});
		thread.start();
		int b = 0;
		for(long i =0;i<count;i++){
			b--;
		}
		thread.join();
		long time = System.currentTimeMillis() - start;
		System.out.println("currency :"+time+"ms,b="+b);
	}
	
	private static void serial(){
		long start = System.currentTimeMillis();
		int a = 0;
		for(long i =0;i<count;i++){
			a += 5;
		}
		int b= 0;
		for(long i =0;i<count;i++){
			b--;
		}
		long time = System.currentTimeMillis() - start;
		System.out.println("currency :"+time+"ms,b="+b);
	}
}
